This episode’s twist on reputation is that Tashigo has a negative opinion on Zoro, who is pretending not to be himself. She has her own life dream, to recover all of the legendary swords from pirates and give them to honorable sword fighters, but she doesn’t think Roronoa Zoro is honorable, yet, in a twist of dramatic irony, she unknowingly helps him obtain 2 legendary swords to go with his original.
In contrast to the shop that Usopp visited, this swordshop is very anti-capitalism. While the shopkeeper is obviously trying to make a profit by swindling unknowing customers, upon recognizing that Zoro is, in fact, a master swordsman, he gifts him the greatest sword in the shop for free. He cannot even bring himself to sell the cursed legendary sword without revealing the curse.
When Luffy says “I will stand where he stood and see what he saw,” he is paying credit to someone he individually respects and honoring the perspective of Gold Roger, eschewing traditional worldviews to place his faith in an unpopular & revolutionary role model. While many people would typically try to learn from established sources, the Straw Hat captain desires to derive his education from someone who shared in his specific goal. This is an act of revolution, to ignore common wisdom & pursue lessons from something or someone that many may consider to be a failure of sorts.
Last note, when I used to play with tarot cards, there was something of a legend that it is possible to read tarot using ordinary playing cards, but that it would eventually give you insight into the cards during regular card games, essentially allowing you to cheat but also removing the ability to ever truly play a game of cards as equals with another player. Buggy using the playing cards to predict the future suits his personality as a cheater and also mirrors the relationship with the devil fruit, in which one gains power but sacrifices something else.